I have a Cary CAD120S MKII and find it quite musical paired with Spendor D7s. As jp mentioned above, the Cary amp would be a perfect match with the SLP-05. Both fully differentially balanced with impedance and gain paired well. I'm using a VAC preamp with mine which is also balanced from input to output. The only amplifier I'd trade the Cary out for is a VAC.
Here's a link to a review from last year you may be interested in.
https://www.stereo.net.au/reviews/review-cary-audio-slp-05-preamplifier-cad-120s-mkii-power-amplifier
Here's a link to a review from last year you may be interested in.
https://www.stereo.net.au/reviews/review-cary-audio-slp-05-preamplifier-cad-120s-mkii-power-amplifier